HairGuide
Why Is My Hair Thinning?
The two patterns behind most thinning, a wider part and a drain full of hair, what each one tells you, what a dermatologist does, and what treatment can and can't do.
Topic
ArticlesTopic 06
Hair
Thinning, shedding, chin hairs and ingrowns. What’s hormonal, what’s not, and what works.
HairGuide
Why Am I Getting Chin Hairs?
Why coarse hairs show up on the chin and jawline at midlife, when it's ordinary hormones and when it's hirsutism, what removal options exist, and the signs that need a doctor.
HairGuide
Why Do I Get Ingrown Hairs and Razor Bumps?
Why hair curls back into the skin after shaving, waxing or tweezing, what to do with a bump, how to shave to avoid the next one, and when it needs a doctor.
HairGuide
Why Is My Scalp So Itchy and Flaky?
Dandruff, seborrheic dermatitis and the other causes of an itchy scalp, how often to use a medicated shampoo for your hair type, and when flakes mean it's time to see a dermatologist.
HairGuide
Do Hair Growth Vitamins and Biotin Work?
What biotin does, when a supplement is worth taking, why the AAD says to test first, the lab-test problem to know about, and what to check before you buy another bottle.
HairGuide
Why Is My Hair Dry and Brittle?
The habits that wear hair down, from rubbing in shampoo to hot tools and tight styles, what dermatologists suggest instead, and when dry, breaking hair points to thyroid disease.
HairGuide
Why Is My Hair Turning Gray?
What happens inside the follicle when hair loses its color, how much is genetics and age, what the sources say about stress, smoking and deficiencies, and when graying early deserves a check.
HairGuide
Can Tight Ponytails and Braids Cause Hair Loss?
How constant pulling on the hairline leads to traction alopecia, the early warning signs that are easy to miss, how long braids should stay in, what recovery looks like, and when it's too late to wait.
HairGuide
Why Is My Hair Shedding So Much? Postpartum and Stress Hair Loss
Why hair falls out in handfuls three months after childbirth, illness or a big stressor, how telogen effluvium differs from permanent hair loss, how long shedding lasts, and when six months is too long.
HairGuide
How Often Should I Wash My Hair?
Why the answer depends on your scalp and hair type, what dermatologists say about oily, dry and curly hair, how to shampoo and condition so you clean without drying, and when flakes mean a medicated shampoo.
HairGuide
What Is Alopecia Areata? Sudden Round Bald Patches
Why the immune system sometimes attacks hair follicles, what the patches look like, how unpredictable regrowth is, what treatments can speed it up, and where to find support when hair loss hurts.
HairEvidence check
Itching After Minoxidil: Which Ingredient Is Responsible?
Patch testing can distinguish allergy to minoxidil from allergy to its solvent. Two sets of published patients show why guessing can lead to another rash.
